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Power Tools 1993 November - Disc 1
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Power Tools Plus (Disc 1 of 2)(November 1993)(HP).iso
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a3821462
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a3821462.txt
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1992-05-09
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Parallel Interface, Technical Data
For HP 1000 A-Series Computer Systems
Product Number 12006A
The HP 12006A is a multipurpose interface for 8- or 16-bit bidirectional
data transfers between external devices and HP 1000 A-Series Computers
and Systems.
[Figure 1 (Parallel Interface diagram) Caption: none]
Features
o TTL (+5 V) and +12 V interface compatibility
o Wide choice of programmable operating modes for easy use with
instrumentation
o Separate 16-bit input and output storage registers
o Built-in DMA capability offering maximum data rates to 850 K words per
second on inputs and 730 K words per second on outputs
o 8- or 16-bit operation with hardware packing of bytes into or from
words
o Pin compatibility with HP 12566B/C interface used in other HP 1000
computers and systems
Functional Specifications
Data Transfer
Protocol: Transfers either 8 or 16 parallel bits at a time
Maximum Rate: The following transfer rates can be attained in a
quiescent RTE-A environment with the HP 12006A interface in the
highest priority position.
Input Output
A600+ 850 K words/s 730 K words/s
A700 790 K words/s 650 K words/s
A900 740 K words/s, 500 K words/s
Typical CPU-to-CPU transfer rates will be less than 50% of the output
rate.
High Logic Level Choices: TTL (+5 volt) is standard; removal of six
resistor packages converts the interface to +12 volt level.
Byte Packing: For use with 8-bit devices, such as tape readers, tape
punches, and some line printers, the interface may be programmed
to automatically pack/unpack bytes into/from 16-bit computer
words.
Device Command Sense Selection: The interface can be set to respond
to either high-true to low-true device commands from the
interfaced device for card/device synchronization.
Logic Levels and Circuits
Clocked Mode: The parallel interface supports a clocked mode in
which data transfers to/from external devices are synchronized by
a flag-to-device handshake that is clocked by the external device.
Transparent (asynchronous) Mode: The parallel interface can also be
used to send data to or receive data from one or several devices,
such as indicators or switches, that do not provide or use any
type of clocking signal. Information is output to the destination
devices exclusively under program control and input information
may be read at any time.
Control and Status Bit Communication
Control Output: Four control bits may be sent to the interfaced
device via an output control word for use as control, command, or
address bits. For instance, they can be decoded to address any of
16 device registers or actions, or to address any of 16 devices
connected to the same parallel interface.
Status Input: Four status bits may be received from the interfaced
device via an input control word.
Direct Memory Access (DMA) Operation
DMA Accessibility: The HP 12006A can access memory under control of
its I/O master processor, regardless of how many other interfaces
in the system are also accessing memory via DMA.
Self-Configured, Chained DMA Mode: The I/O master processor on the
HP 12006A interface supports a self-configuring mode of operation.
In this mode, instead of interrupting the central process or after
a block transfer, the I/O processor fetches a new set of control
words for the next transfer. This process continues as long as
additional sets of control words are available. Chained DMA
transfer is particularly useful for storing several sequential
scans of measurement channels from an instrumentation subsystem
into memory, which can be accomplished without interrupting
computations or other processing by the central processor.
Configuration Information
Computer and System Compatibility: The HP 12006A Parallel Interface
is compatible with all HP 1000 A-Series computers and systems.
Connector Compatibility: The HP 12006A interface printed circuit
cable connector is pin-compatible with the HP 12566B/C
Microcircuit Interface, permitting direct substitution of an
HP 1000 A-Series computer or system with the HP 12006A interface
for an HP 1000 M/E/F-Series with HP 12566B/C interface.
Software Support: The HP 12006A interface is supported by RTE-A
interface driver ID.5O.
Diagnostic Support: A diagnostic and a test hood for the HP 12006A
interface are provided in the HP 24612A Diagnostic Package.
Installation: Set device command sense switch to appropriate level;
set the interface's I/O address on the select code switches; turn
off power to the computer and interfaced device; plug the
interface into the computer backplane; connect an appropriate
cable from the interface to the device; and integrate the
interface driver into the operating system if that has not been
accomplished previously.
Note: The I/O address setting of the interface select code switches
is independent of the interface card's position in the computer
backplane.
Electrical Specifications
Direct Current Requirements: Configured as a +5 V device interface:
+5 V at 1.94 A; +12 V at 179 mA. Configured as a +12 V device
interface: +5 V at 1.61 A; +12 V at 175 mA
Physical Characteristics
Dimensions: 28.9 cm long by 17.2 cm wide by 0.2 cm board thickness
(11.4 in by 6.75 in by 0.06 in) with 1.0 cm (0.4 in) top-of-board
parts clearance and 0.5cm (0.2 in) beneath-board clearance
Weight: 370 grams (13 oz) with mating connector
Ordering Information
The HP 12006A includes:
12006-60003 Parallel Interface Card
5061-3426 48-pin Connector Kit
12006-90001 Reference Manual
From HP Networking Communications Specifications Guide,
5091-3821E, 9205, p 462
Associated files: la3821dq.gal, la3821dq.plt
Parallel Interface, Technical Data